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Method for Sensing Whitespace in a Wireless LAN System, and Apparatus for Performing Same

a wireless lan and whitespace technology, applied in the field of wlan, can solve the problems of inflexible handling of an increase in the number of users and the possibility of coexistence, and achieve the effect of efficient us

Inactive Publication Date: 2012-07-19
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a method for sensing channels in a whitespace band of a WLAN system. This allows unlicensed devices to efficiently use the channels of the whitespace band while maintaining protection for licensed users. The method involves transmitting a sensing request to an access point, sensing the target channel, and determining a channel through which the sensing result will be transmitted based on the presence of a licensed user. The method can adapt to changes in the situation of the channel and can be used in IEEE 802.11 WLAN systems. Overall, the invention provides a way to efficiently use the channels of the whitespace band and ensures protection for licensed users.

Problems solved by technology

In this case, there may be a problem in the ability to flexibly handle an increase in the number of users (that is, scalability).
Furthermore, since several wireless communication systems and several unlicensed devices coexist, a problem may occur in coexistence.

Method used

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  • Method for Sensing Whitespace in a Wireless LAN System, and Apparatus for Performing Same
  • Method for Sensing Whitespace in a Wireless LAN System, and Apparatus for Performing Same
  • Method for Sensing Whitespace in a Wireless LAN System, and Apparatus for Performing Same

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Embodiment Construction

[Problems to be Solved by the Invention]

[0011]It is an object of the present invention to provide a channel sensing method of collecting and updating pieces of information about the channels of a whitespace band so that an unlicensed user can use the channels of the whitespace band.

[0012]It is another object of the present invention to provide a channel sensing mechanism of a station at the request of an AP (Access Point) for the channels of a whitespace band and a method of adaptively determining a transmission channel of a sensing result according to a change in the situation of a channel.

[Means for Solving the Problems]

[0013]According to an aspect of the present invention, a method of sensing a channel of a whitespace band in a WLAN system includes receiving a sensing request, including a candidate report channel and a target channel of the whitespace band to be sensed, sensing the target channel, and determining a channel through which a sensing result will be transmitted accord...

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Abstract

Provided is a method for sensing a channel of a whitespace band in a wireless LAN system. A method for sensing and reporting a channel of a whitespace band in a wireless LAN system according to one embodiment of the present invention comprises the steps of: receiving a sensing request including a candidate report channel and a target channel of a whitespace band to be sensed; sensing the target channel; and determining a channel for transmitting sensed results in accordance with whether a licensed user is detected on the target channel, and transmitting the sensed results.

Description

FIELD OF THE INVENTION [0001]The present invention relates to a WLAN and, more particularly, to a method of sensing a whitespace band in a WLAN system.BACKGROUND OF THE INVENTION [0002]There may be a frequency band in which several kinds of wireless communication systems can coexist. An example of the frequency band is TV whitespace.[0003]TV whitespace refers to unused frequency bands remaining as residual bands owing to the digitalization of analog broadcasting. TV whitespace refers to a spectrum of 512 to 698 MHz allocated to broadcast TV.[0004]When a licensed device is not being used in the corresponding spectrum, an unlicensed device can use the corresponding band.[0005]If it is sought to use TV whitespace, an unlicensed device has to obtain available channels from a corresponding area by utilizing a geo-location database.[0006]Furthermore, in order to solve a coexistence problem between unlicensed devices using TV whitespace, a signaling protocol, such as a common beacon frame,...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H04W24/00
CPCH04L5/0053H04L27/0006H04B17/309H04B17/23H04W16/14
Inventor SEOK, YONG HO
Owner LG ELECTRONICS INC
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